Advertising medium



FIG. 1 is a schematic perspective view of a first embodiment of the design for an advertising medium according to the invention;

FIG. 2 is a schematic front view of a first embodiment of the design according to the invention;

FIG. 3 is a schematic side elevational view of a first embodiment; the opposite side elevational view is the same;

FIG. 4 is a schematic top plan view of a first embodiment; the underside view is the same;

FIG. 5 is a schematic rear view of a first embodiment of the design according to the invention;

FIG. 6 is a schematic perspective view of a second embodiment of the design for an advertising medium according to the invention;

FIG. 7 is a schematic front view of a second embodiment of the design according to the invention;

FIG. 8 is a schematic side elevational view of a second embodiment; the opposite side elevational view is the same;

FIG. 9 is a schematic top plan view of a second embodiment; the underside view is the same;

FIG. 10 is a schematic front view of a third embodiment of the design for an advertising medium according to the invention;

FIG. 11 is a schematic perspective view of a third embodiment of the design according to the invention;

FIG. 12 is a schematic side elevational view of a third embodiment of the design according to the invention; the opposite side elevational view is the same;

FIG. 13 is a schematic top plan view of a third embodiment; the underside view is the same; and,

FIG. 14 is a schematic rear view of a third embodiment of the design according to the invention. 

The ornamental design for an advertising medium, as substantially, as shown and described. 